The Wikipedia article of the day for January 1, 2020 is Battle of Calais.
The Battle of Calais took place in the early morning of 1 January 1350, during the Hundred Years' War. English troops in the occupied French city of Calais ambushed and defeated an unsuspecting French force which was attempting to take the city. Despite a truce being in effect, the French commander Geoffrey de Charny had planned to take the city by subterfuge, and bribed Amerigo of Pavia, an Italian officer of the city garrison, to open a gate for them. The English king, Edward III, became aware of the plot and personally led his household knights and the Calais garrison in a surprise counter-attack. The French were routed by this smaller force, with significant losses and all of their leaders captured or killed. Later that day, Edward dined with the highest-ranking captives, treating them with royal courtesy except for Charny, whom he taunted for having abandoned his chivalric principles by both fighting during a truce and attempting to purchase his way into Calais rather than fight.